Ketoprofen Impurity 91 CAS CATO-C4X-147191
| CAS No. | CATO-C4X-147191 |
| Molecular Formula | C19H20O4 |
| Molecular Weight | 312.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Ketoprofen Impurity 91 (C19H20O4) contains a flavonoid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Ketoprofen Impurity 91 (CAS CATO-C4X-147191, C19H20O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Ketoprofen Impurity 91 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H20O4 |
| Molecular Weight | 312.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Ketoprofen Standards
- Ketoprofen Impurity 80 (Mixture of Diastereomers) (CAS 2126161-79-1)
- Ketoprofen Impurity 113 (CAS CATO-C4X-1471113)
- Ketoprofen Impurity 65 (CAS CATO-C4X-147165)
- Ketoprofen Impurity 100 (CAS CATO-C4X-1471100)
- Ketoprofen Impurity 98 (CAS CATO-C4X-147198)
- Ketoprofen Impurity 81 (CAS CATO-C4X-147181)
- Ketoprofen 2,3-Butylene Glycol Ester (CAS 94561-67-8)
- Ketoprofen EP Impurity L (Mixture of Enantiomer) (CAS 1797984-80-5)
Recommended Standards
- Eugenol Impurity 13 (CAS 1426542-80-4)
- Flurbiprofen Impurity 15 (CAS CATO-C4X-144415)
- Tegoprazan Impurity 6 (CAS CATO-C4X-22976)
- Desfluoro Flurbiprofen Axetil (Mixture of Diastereomers) (CAS 1685278-08-3)
- Xylometazoline Impurity 12 (CAS CATO-C4X-178212)
- Olanzapine EP Impurity B (CAS 221176-49-4)
- Erlotinib Impurity 58 (CAS CATO-C4X-106958)
- (2R,3R)-1-ethyl-5-oxo-2-(3,4,5-trimethoxyphenyl)pyrrolidine-3-carboxylic acid (CAS 1071535-97-1)
- 1-(Bromomethyl)-4-methyl-2-(trifluoromethyl)benzene (CAS 261952-18-5)
- 3-(Benzo[d][1,3]dioxol-5-yl)-7-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 1713174-08-3)
- 6-(Octyloxy)hexan-1-ol (CAS 88595-21-5)
- 4-Methyl-3-{2-[3-methyl-5-(trifluoromethyl)-1H-pyrazol-1-yl]-1,3-thiazol-4-yl}-5-({[4-(trifluoromethyl)phenyl]methyl}sulfanyl)-4H-1,2,4-triazole (CAS 956753-96-1)
- Sulfo-cyanine3 carboxylic acid, 95% (CAS 146368-13-0)
- Insulin Degludec Impurity 20 (CAS CATO-C4X-215720)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com